103results about How to "Reduce contact wear" patented technology

An annular combustion chamber comprising axial walls interconnected by a chamber end wall having a coefficient of thermal expansion that is different from that of the axial walls, the chamber end wall being provided with a plurality of inner and outer fastener tabs secured by fastener systems to the end portions of the axial walls. Each fastener system comprises a bolt, a nut tightened onto one of the ends of the bolt, and a slideway bushing disposed around the bolt between the nut and the end portion of the corresponding axial wall, a determined amount of radial clearance being provided between the nut and the end portion of the axial wall so as to enable the chamber end wall to expand radially freely in operation relative to the axial walls.

The invention relates to a negative pressure groove end face mechanical seal structure, comprising a mechanically sealed moving ring and a mechanically sealed static ring, one side of the end faces of the moving ring and the static ring is a high pressure side namely upstream, the other side of the end faces of the moving ring and the static ring is a low pressure side namely downstream, at leastone end face of the moving ring or the static ring is provided with negative pressure groove groups which are symmetrically distributed with the center of rotation, the upstream of each negative pressure groove group is provided with a micropore annular band, each negative pressure groove group is composed of micropore dynamic pressure grooves with spiral deformation and inclination and relief grooves, the micropore dynamic pressure grooves and the relief grooves are distributed at intervals, the relief grooves are close to the terminals of the dynamic pressure grooves, and the downstream of each negative pressure groove group is provided with an annular sealing dam with a smooth plane. The invention has the beneficial effects of enhancing antijamming capability of sealing in operation athigh speed, improving dynamic pressure opening capability of a high speed seal face under the low speed working condition, realizing non-contact stability of the seal face under the high speed working condition, reducing end face contact wear, prolonging service life and improving sealing reliability.

This invention relates to a fastener assembly that has a rail (1) and a fastener device (6) that can be installed in a transport vehicle, characterized in that a rail head (2) is coated with a layer (3) of alumina with polytetrafluoroethylene seal and that at least a portion (5) of the fastener device in contact with the rail head is made of metal coated with a layer of polymers (7).

The present invention relates to a liquid crystal display (LCD), comprising: a backlight unit; a plurality of optical films disposed above the backlight unit; and a liquid crystal panel disposed above the optical films, wherein a protection layer is disposed between the liquid crystal panel and the optical films in order to support the liquid crystal panel when the liquid crystal panel is bended.

The invention relates to a steel wire rope with a single-stranded compound core for an elevator. The steel wire rope with the single-stranded compound core for the elevator is characterized by comprising the single-stranded compound rope core and outer strands, and the outer side of the single-stranded compound rope core is wrapped with six to nine outer strands; the single-stranded compound rope core comprises ten to thirty-six outer wound steel wires and a fiber core, and the surface of each outer wound steel wire is plated with a layer of pure zinc or zinc-aluminum alloy. The steel wire rope with the single-stranded compound core for the elevator has the advantages that the corrosion resistance and the abrasion resistance are better, and the use requirements of medium and high speed elevators can be met.

In a tripod type constant velocity joint, in order to produce a recovery couple to correct the inclination of the rolling direction of a roller and to reduce surface pressure without using angular contact provided by a Gothic arch-shaped roller guide surface, it is arranged that where r1 and r2 are the minimum and maximum values, respectively, of the radius of curvature of the generatrix for the outer peripheral surface of the roller within the range where solid contact is effected by elastic deformation of the contact section between the roller and the roller guide surface under a predetermined torque load with respect to the radius of curvature of the roller guide surface, the radius of curvature (r) of the generatrix be set in the range r1≦r≦r2.

A fluid dynamic pressure bearing apparatus includes a radial dynamic pressure bearing formed in a gap portion between a bearing member and a shaft member. The apparatus also includes a thrust dynamic pressure bearing having a first thrust bearing portion formed between a top surface of the thrust plate and a first facing member opposing thereto in the axial direction and a second thrust bearing portion formed between a bottom surface of the thrust plate and a second facing member opposing thereto in an axial direction. Dynamic pressure generating grooves are formed on the radial dynamic pressure bearing and the thrust dynamic pressure bearing. The shaft member and the bearing member are rotated together as a rotation member, such that the rotation member is supported in a position such that a gap space L1 of the first thrust bearing portion is larger than a gap space L2 of the second thrust bearing portion and the depth of the dynamic pressure generating grooves where the gap space is smaller is formed shallower than that where the gap space is larger.

A connector includes a contact in an elongated shape that is electrically conductive, and a housing that has an internal space is formed. The contact includes a contact portion, a connection portion, a fixing portion, and a protruding portion. The contact portion is to be electrically connected to an electrically conductive member when the contact is housed in the housing. The connection portion is electrically connected to a core wire of an electrical wire. The fixing portion is provided on a side opposite to the contact portion relative to the connection portion, and fixes a covering of the electrical wire. The protruding portion is provided on an end portion side of the fixing portion opposite to the connection portion so as to protrude. The protruding portion reduces the amount of movement of the contact inside the internal space of the housing.

The invention provides a runner blade convoluting mechanism. Blades are installed in sliding vane grooves of a turning wheel. Under the action of rotational centrifugal force of the turning wheel or elastic force of springs installed in the sliding vane grooves, the outer arc surfaces of the top ends of the blades are in line contact with the inner arc wall surface of a cylinder body. The structures of the blades are rolling blades or sliding blades, the rolling blades are in a cylindrical shape, and the rolling blades roll in the sliding vane grooves of the rotating wheel. The sliding bladesslide in the sliding vane grooves of the rotating wheel, and the outer arc surfaces and the lower arc surfaces of the sliding blades are of the same center of a circle. Through the technical improvement, a blade meshing control device changes the contact rotary motion between the blades and the cylinder body into the meshing rotary motion, and the rotational speed is not affected by the speed of acontact line. The performance of pumps, hydraulic power machines, pneumatic machines, compressors, expansion power machines and engines in the technical field of fluid machinery is improved.

The invention discloses a knot disengaging mechanism and method of a knotter. The knot disengaging mechanism of the knotter comprises a knotter jaw and a tool rest, a long groove is machined in the circular-arc-shaped ridge of the knotter jaw, the matching surface of the tool rest with the circular-arc-shaped ridge of the knotter jaw is provided with a protrusion, and the protrusion is matched with the groove and can move along the groove. According to the knot disengaging mechanism and method of the knotter, optimization and improvement are conducted on the tool rest and the knotter jaw part, an original knot disengaging mode is changed, mutual contact friction of the tool rest and the knotter jaw is avoided in the knot disengaging process, and the purposes of reducing abrasion of related structures and forcefully disengaging a knot are achieved. The use reliability of the knotter is improved, the assembly difficulty is reduced, the interchangeability of parts is improved, and the knot formation rate of the knotter is guaranteed. The knot disengaging mechanism and method of the knotter are mainly applied to the field of knotter application.

The invention discloses an idler wheel strip with a guide. The idler wheel strip with the guide comprises an idler wheel assembly and idler wheel strip flanges. The idler wheel strip flanges include the left idler wheel flange and the right idler wheel flange. The left idler wheel flange and the right idler wheel are parallel and symmetric. The idler wheel assembly is arranged between the left idler wheel flange and the right idler wheel flange. One end of the left idler wheel flange and one end of the right idler wheel flange are provided with a guide head assembly. By means of the idler wheel strip with the guide, the problems that in the threading process, plates with different specifications, thicknesses and materials droop, and consequently material clamping and surface defects are caused are solved, smooth plate conveying is achieved, and the material clamping shutdown rate and the reject ratio of the plate surface quality are reduced.

The invention relates to the technical field of automobile vacuum, and discloses an air cylinder type vacuum pump. The air cylinder type vacuum pump comprises a pump body and a power input shaft stretching out of the pump body. The power input shaft is opposite to a power transmission shaft extending out of an external power mechanism. The power transmission shaft rotates with the axis of the power transmission shaft as the rotating axis. In addition, the air cylinder type vacuum pump comprises an air cylinder. The air cylinder is used for controlling connection or separation of the power transmission shaft and the power input shaft. When the power transmission shaft and the power input shaft are connected, the power transmission shaft drives the power input shaft to rotate, and the air cylinder type vacuum pump works. When the power transmission shaft and the power input shaft are separated, the air cylinder type vacuum pump stops working. The air cylinder type vacuum pump can be started and stopped according to actual needs, and is fast and accurate in control, lower in energy consumption and longer in service life.